Pattern board



Jan. 25, '1949. H, Q APP-si A 2,460,213

PATTERN BOARD I Filed July 2s, 1945 Patented Jan. 25", 1949 1,-;

,g oFFice PATTERN BOARD `Harold 0. Capps, Houston, Tex.

. Y' Application July 28, 1945, Serial No. 607,612v

' This invention relates to a mold and has more particular relation to the pattern board of the mold. Y y A. An object of the invention is tol provide, in a mold, a= novel type of pattern board on one sideof which two halves ofthe pattern of a casting are fastened and which serve simultaneously as the cope and drag parts of a molding flask.

Another object is to provide a pattern board comprising a metal frame and a wooden plate mounted therein with releasable means for securing the plate in the frame and means for accurately centering and maintaining the plate in an exact selected position therein.

Another object is to provide, in combination with a pattern board, a flask and means whereby the flask may be maintained accurately in the required relation with the board.

With the above and other objects in view this invention has particular relation to certain novel features of construction, arrangement of parts and use, an example of which is given in this specification and illustrated in the accompanying drawings, wherein:

Figure 1 is a top plan view of the pattern board.

Figure 2 is a bottom plan view, showing one of the clamp dogs in released position.

Figure 3 is a longitudinal sectional view of the complete mold taken on the line 3 3. of Figure 2.

Figure 4 is a fragmentary longitudinal sectional view taken on the line 4--4 of Figure 2, and

Figure 5 is a cross sectional view taken on the line 5-5 of Figure 3.

Referring more particularly to the drawings the numeral I designates a metal frame, preferably, rectangular in form and having an inside flange 2 extending al1 the way around the frame and spaced from the top thereof.

The frame also has the outwardly turned end lugs 3, 3 with the upstanding posts 4, 4 secured thereto.

Seated on the ange 2 there is a wooden plate 5 which ts closely in the frame and whose upper face is flush with the top of the frame; the plate, of course, may be made of other suitable material. y

Secured to the under side of the plate 5, at one end, there is a transverse metal clamp 6 whose outer margin 'I is spaced from the plate 5. This margin of .the clamp engages underneath the adjacent end ange of the frame, said flange having a countersunk portion 8 to receive said free margin of the clamp 1.

Spaced from the other end of the plate 5, and secured thereto, there is a transverse metal clamp 9 whose outer margin I0 is spaced from said plate.

The margins 1 and I0 of said clamps have the central, outwardly flared notches II and I2an`d secured. to the ends `of the vframe are the inwardly projecting, tapering, lugs I3, Il'which: `fit snugly in said notches and hold the plate 5 centered in the frame I.

Pivoted to .the end of the frame in front of the clamp 9 there are the clamp dogs I5, I5 whose free ends are engageable with, and releasable from, the margin I0, of the clamp 9. The pivoted ends of these dogs have the outwardly turned handles I6, IB preferably formed integrally therewith.

Two halves I1, I1 of the pattern are secured to the top side of the plate 5 and are connected by the runner I8 which form, in the sand, gates to the pattern cavities.

The numeral I9 designates the boxlike flask. This flask has the end bosses 20, 20 provided with holes to receive the posts 4, 4.

In use the dogs I5 are swung outwardly into released position and the plate 5 is inserted into the frame I with the flange 'I engaged under the adjacent end rib 2 and with the lug I3 seated in the end notch II. The dogs I5 are then swung inwardly underneath the flange I0, as shown in Figures 1 and 3 and the plate 5 is thus fastened securely in the frame with the end lug I4 fitting in the notch I2. The flask I9 is then seated on the frame with the posts 4 fitted through the holes in thelugs 20.

The ask is then filled with sand which is tamped closely around the patterns and runner. The flask with the tamped sand therein is then lifted off and another placed on the frame and filled with sand and tamped as before and the two flasks then placed in coinciding relation so that the casting and gate cavities will register and two complete castings may be made at one pouring of the meinten metal. This metal' may be poured through a sprue provided in the sand of one of the flasks and connected with the gates formed by the runner I8.

Two castings may thus be made by one pouring of moulten metal whereas by the present method only one casting is made. This is true since by the method now commonly used one half of the pattern is secured on each side of a plate and therefore the plate must be reversed and two flasks tamped with sand to form a single casting cavity.

When the desired number of castings have been made from any particular pattern the plate 5 may be removed and another plate with other patterns thereon may be substituted therefore for making a different type of casting.

Itis, of course, to be understood that the halves of more than one pattern, connected by runners, may be secured to the top side of plate 5, and the production of castings correspondingly increased.

This type of.v 'pattern board may `be easily mounted in a molding Vmachine and with the removable plate 5 will increase casting production without loss of castings due to misalignments.

What I claim is: t

In a mold, a pattern board comprising, a frame having an inside inwardly extending flange around the frame and spacedftromftheitqpthere,

of, a plate tted closely within the'frarne and resting on said flange and Whose upper-faceds4 ush with the top of the frame, a transverse A,clamp.secured to the under` side .Ofwthe plate. at onevendl thereof,- and` whose louter margin .is .spacedtgfrom 4the plate; saidA `spaced ,margin .en- :gaging ,underneath the; adjacent endang of the `frame, .a transverse clampl securedvto the bottom of the ,platevlandespaced `from .the other end- I,off` said plate, and whose outer margin. is

fsaiipf'notchs to;hold the platecentergd relative lto the frame HAROLD O. CAPPS.

REFERENCES CITED yTire,following references are of record in the LIle of this patent:

STATES PATENTS 

